Gas-mixer.



PATENTED APR. 19, 1904.

A. M. GUMMER.

GAS MIXER.

APPLICATION FILED FEB.15,'1904.

N0 MODEL.

TNx/ENTCJR WITNESS E15 UNrrnD STATES Patented April 19, 1904.

PATENT OFFICE.

AUGUST M. GUMMER, OF DAYTON, OHIO, ASSIGNOR TO THE GEM OITY STOVE (10.,OF DAYTON, OHIO.

GAS-MIXER.

SPECIFICATION forming part of Letters Patent N0. 757,916, dated April.19, 1904. Application filed February 15, 1904. Serial No. 193,576. (Nomodel.)

To (bi/Z whmn it nuty concern:

Be it known that 1, AUGUST M. GUMMER, a

. citizen of the United States, residing at Dayton, in the county ofMontgomery and State of Ohio, have invented certain new and usefulImprovements in Gas-Mixers; and I do declare the following to be a full,clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame, reference being bad to the accompanying drawings, and to thefigures of reference marked thereon, which form a part of thisspecification. 7

This invention relates to a mixer for gasburners, such as are used forcooking ranges and stoves.

The object of.the invention is to provide means for regulating theamount of air to be mixed with the gas to form a perfect combustion.

To this end the invention relates specifically to means for securing themixer-cap in position after the proper area of openings for theadmission of air to the mixer has been obtained. Heretofore muchdifficulty has been experienced in the accidental movement of themixer-cap controlling the airports,whereby said air ports or openingseither become enlarged or closed to an undesirable extent.

The present invention obviates the possibility of accidentaldisplacement of the mixercap.

It may be further stated that prior to the present invention it has beencustomary to secure the mixer-cap in position by means of a set-screwand screw-driver. In such cases the usual small set-screw would becomerusted and corroded to such an extent that its removal by a screw-driverwould often result in the breaking of the screw and a removal of theentire burner became necessary in order to release the mixer-cap. Thisdifliculty is entirely obviated by the present invention.

Preceding a detail description of the invention reference is made to theaccompanying drawings, in which- Figure 1 is a side elevation, partly insection, of the mixer and mixer-cap. The burner is also shown in thisview partly broken away.

Fig. 2 are detail views of the specially-constructed mixer or clamp-nut.Fig. 3 is afront elevation of the mixer, showing the mixer-cap theproper admixture of gas and air is introduced to a burner 2 through themixer-tube 3, the burner, mixer-tube, and head being preferably of asingle casting in order to obviate the possibility of leakage at pointsbetween the mixer-head and the burner. The mixer, it will be observed,is enlarged in the form of a head, in the outer rounded surface of whichthere is provided a series of. air ports or openings 4, arranged atopposite points. There is also a central screw-threaded opening 5, whichis engaged by the exteriorly-screwthreaded hollow stem 6 of theclamp-nut 7, said nut being screwed into said opening by means of thewings 8, projecting therefrom. The clamp-nut is provided with a smoothbore 9 of uniform diameter extending entirely through the nut, which isdesigned to receive the discharge end 10 of the gas-regulating cock 11.Interposed between the head of the nut 7 and the mixer-head 1 there is amixercap 12, which acts as a valve. This cap snugly fits against theouter rounded surface of the mixer-head and is provided with a number ofopenings or ports 13, which correspond in number and in shape to the airports or openings 4: in the mixer-head. This mixercap may be turned uponthe mixer-head to the desired positions to restrict or enlarge the airports or openings through which the air is admitted to the interior ofthe mixer. As shown in Fig. 3, the air ports or openings leading to themixer-head are reduced to about one-half of their full capacity byshifting the mixer-cap 12 to either side, after which the clamp-nut 7 isscrewed into the mixer-head, and the shoulder or head of said nut isthereby caused to bind the mixer-cap 12 rigidly against the mixer-head,and all possibility of said' cap shifting its position is obviated, and,further, the mixer-cap may be released with facility by turning said nutwhen it becomes necessary to alter the size of the air-openings.

The gas-regulating cock 11 is provided with a shoulder 14:, which fitsagainst the outer side of the head of the clamp-nut 7 and allows someslight movement of said nut away from the mixer-cap whenever it becomesnecessary to readjust the air-openings to decrease or enlarge the areaof said openings. The extent of movement necessary to be imparted tosaid nut under such cases is very small, only being sufficient torelease the pressure of the nut against the mixer-cap. 15 designates agassupply pipe With which the gas-regulating cock 11 is connected.

Having described my invention, I claim 1. The combination of amixer-head having a series of ports for the admission of air, and acentral screw-threaded opening, a'mixer-cap fitting against saidmixer-head and provided with corresponding openings registering with theopenings in the mixer-head, a clamp-nut having a tubular screw-threadedstem which penetrates the central openings in the mixerhead andmixer-cap, the head of said nut engaging said cap and clamping itagainst the mixer-head, and a gas-supply cock having its discharge-stemprojecting through said nut and discharging gas into the mixer-head.

2. In a fuel-gas burner, a mixer-head having a series of air ports oropenings and a central opening, a mixer-cap inclosing the outer side ofthe mixer-head and having a series of air ports or openings which mayregister with the air ports or openings in the mixerhead and whereby thedischarge of air to the mixer is regulated, a clamp-nut screwed into thecentral opening in said mixer-head and binding the mixer-cap againstsaid head to make permanent the position of the openings in said capwith relation to the openings in the mixer-head, the said clamp-nuthaving an opening through its center for the reception of the dischargeend of a gas-regulating cock.

3. The combination of a gas-mixer having the outer surface of its headrounded and provided with a series of air-openings and a centralscrew-threaded opening, a mixer-cap conforming to the shape of themixer-head and having a series of air-openings which register with thesimilar openings in the mixerhead, and a central opening which registerswith the central screw-threaded opening in the mixer-head, aclamping-nut having a tubular screw-threaded stem which penetrates thecentral openings in the mixer-cap and the mixer-head, said nut having anannular shouldischarging gas into the center of the mixerhead.

In testimony whereof I affix my signature in presence of two witnesses.

AUGUST M. GUMMER.

Witnesses:

R. J. MOCARTY, CAROLYN M. THEoBALD.

